fix

src/tournament/tournament.service.ts

@@ -397,6 +397,7 @@ export class TournamentService extends CrudService(Tournament, {
     updates: { id: T; seq: number }[],
   ) {
     if (updates.length) {
+      if (updates.length > 1) {
         await this.repo.manager
           .createQueryBuilder()
           .update(Participant)
@@ -409,6 +410,11 @@ export class TournamentService extends CrudService(Tournament, {
           })
           .whereInIds(updates.map((p) => p.id))
           .execute();
+      } else {
+        await this.repo.manager.update(Participant, updates[0].id, {
+          seq: updates[0].seq,
+        });
+      }
     }
 
     return new GenericReturnMessageDto(